questions 27 please i need your help. mitter acetylcholine stimulationa True b)

Question

questions 27 please i need your help.

mitter acetylcholine stimulationa True b) nerve n complex of actin fil change on actin filament and exposing active bindin with Tnec for myosin h bind with a) Tue b) False Acetylcholine binds with motor end plate receptor of a muscle fiber at neuromuscular 23. Normal resting membrane potential in a skeletal muscle fiber is about -90mv True mer of globular subunits called G actin True 24. Each actin molecule is a helical poly 25. Calcium cause the synaptic vesicles, filled with neurotransmitter acetylcholine, to fuse with the membrane of the nerve terminal upon stimulation 26. The property of a mucle fiber to shorten after being stimulated is a) Elasticity byContractility c) Extensibility d) Excitability 27Which of the following step is the correct sequence in muscle contraction? action potential propagated along the sarcolemma, travels down the T tubules to triggers Ca release from terminal cisternae b) Ca2+ binds to troponin; causes blocking action of tropomyosin to cease c) Actin active binding sites on actin filament gets exposed; causing myosin cross bridges d) myosin head pivots and pulls actin filament toward M line e) all of the above 28. Which of the ion concentration is higher in the extracellular fluid? a) Potassium ions Sodium ions c) Calcium ions d) negatively charged ionic proteins 29. Which of the following muscles is voluntary? a) The muscle in the wall of the urinary bladder at the elbow 6) The muscle that extends the arm c) The muscle in the wall of the heart. d) The muscle of the stomach 30. A sarcomere is part of a: a) perimysium b) endomysium c) myofilament. myofibril

Explanation / Answer

Question 27 answer should be..

A) action potential propagated along the sarcolemma travels down the T tubules to triggers Ca2+ release from terminal cisternae..

It is because rest options are not true..

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